Refining engine for paper production



June 8 1926.

J. T. MURPHY REFINING ENGINE FOR PAPER PRODUCTION Filed- August 23. 1923 2 Sheets-Sheet l June 8 192.6.

J. T. MURPHY REFINING ENGINEl FOR PAPER PRODUCTIAON Filed August 23, 1923 2 `sheets-sheet 2 Patented June 8, 1926.

PATENT OFFICE.

JAMES T. MURPHY, 0F CHICAGO, ILLINOIS.

BEFINING ENGINE FOB PAPER PEODUCTION.

Application led August 23, 1923. Serial No. 659,013.

This invention relates to improvements in refining engines for paper production, and particularly to that type of machine employed in performing the final refining operations upon pulp to be used in the manufacture of paper board or sheet.

The primary object of the invention is to provide a machine of a greater capacity than machines heretofore manufactured, and one which will perform its refining opera-tions lwith substantially the same degree of perfection when eithersmall quantities of pulp are being fed through the machine or when large quantities are being fed through, the machine being' provided with automatic means for .accommodating widely varying quantities of pulp. The accomplishment of the foregoing feature of the inventionmakes possible thedirect cannection of my refining engine with any ordinary type of beating engine, whereby the l pulp flows ldirectly from the beating engine to the refining engine without the intervention of the usual feed regulating devices.

Another object of the invention is to provide a refining engine in which the cutting roll is fioated so that it may assume difier ent positions with respect to the stationary cutting blades dependent upon the quantity or character of the pulp passing bep tween the blades of the cutting roll and the stationary blades. This construction results in great economy of operation because in the event foreign uncuttable matter enters the refiner, the cutter wheels will be raised so as to allow the foreign substance to pa'ss through without damage either tothe stationary blades or to the blades of the cutter wheel.

Another object of myinvention is to provide readily adjustable means for altering the effective weights lof the cutter Wheels so .as to readily change the characterv of the' pulp refinement.

Another object of the invention is to so.

` associatetwo or more refining engines that they may be readilyv operated either in series or 1n parallel, orimay be operated as separate units in the event that different characters of pulp are desired.

Still further objects of the iinvention will appear from an examination of the drawings and from the following specification and claims.

My invention is illustrated in the accompanying drawings, in which- A272, flied Figure 1 is an elevation of the preferred form ofv my invention showing the4 fluidpressure connections by means of which the ,cutter rolls are raised and lowered, and b means of which the ressure under which they operate is contro led;

Figure 2 is a plan view of the preferred form of my invention, the right hand portion being in section;

Figure is a vertical section through the refining machine proper showin a method of connecting the same with a eating eneine;

Figure 4 is a plan view of a modification in which the cutterv rolls are raised and lovered by means of hand operated screws, an

Figure 5 is an elevation of the modification shown in Figure 4.

Thel structure'of my invention comprises primarily a bin or trough 10 having compartments 11 at the ends thereof for reception of pulp emulsion Vfrom any desired form of beating engine 12. The top of this bin is closed by a removable cover or deck 13. The beating engine partially illustrated in Figure 3 is that shown and described in my patent application, Serial Number 596,-

October 23, 1922. Next adjacent the compartments 11 are compartments forming the housings for the cutter wheels 14. The bases of these. housings are in the .form of slightly less than half cylinders, and are lined with blades 15 mounted in four groups, the blades ofeach group being held in frames 1.6 wherein they are bound by .vided with blades 18 extending lengthwise of the cylindrical surface of the wheel, these blades being similarly secured in place by wedge-shaped blocks of wood 19, the blades of the bed and those of the wheel being preferably set somewhat diagonally so that they will have a shearing action against one another. The blades of the wheel are also preferably made of broader material than the blades ofthe bed, which construction has been`found in practice to assist in maintaining the sharpness of the edges of the blades.

The Vshafts 21 which carry the cutter rolls' 14 and the belt or pulley wheels 22 are supported in bearings 23 outside theI bin, these woodeny wedges 174 ,so that the frames '16 with their wedges and blades can bearings' being mounted upon yokes 24, the ends of which are supported upon four pisvtons 25 mounted within the cylinders 26..

In order to seal the openings through which the shafts 2l extend in the walls of the bin 10, I provide a collar 27 for each opening, each collar having .a flange 28 i'tted vided withtwo discharge openings 31 and 32. A partition 33 divides the chamber 30 into two parts, one associated with each of and bythe chains the cutter wheels 14. A valve mechanism 34, corresponding to that shown and described in my application, Serial No. 623,694, filed March 8, 1923, is arranged for opening and closing` a port 35 within this partition 33.

Vithin the central chamber 30 are two adjustable weirs 36 provided with operat ing handles 37 which are extended outside the side walls of the bin and which are arranged to be locked in any one of a plurality of rotary positions. l

The spaces within the cylinders 26 and below the pistons 25 of the four cylinders .which control one cutting wheel are conn ected by a pipe line 40, a valve 41 and pipe line 42 with a tank 43.containing oil or otherv suitable, fluid under high pressure. The pipe .line is provided with an eX- pansion chamber 44 and with a pressure gauge 45. The spaces above these pistons 25 are likewise connected in groups of four by means of pipe line 46,A valve 47 and pipeline 42 with the saidchigh pressure chamber 43. Pipe line 46 is also provided with an expansion chamber 48 and with a pressure gauge 49. Ther valves 4l and 47 are three port valves connected with a pipe line 50 to a reservoir 51 from which the Aoil or other fluid may be pumped back into the high pressure tank 43 by means of the gear pump 52.

In the modification shown in Figures 4 and 5,v the cutter rolls are raised and lowered by means of screws about which sleeves 56 are threaded. y Surrounding each of these sleeves is a pair of springs 57, 58, the spring 57 abutting the lower side of the yoke end 59 and the spring 58 abutting the' upper side thereof, so that by the'vertical adjustment of the sleeve 56 by means of the screw 55, the yoke can be raised or lowered, or caused to pressdownwardly with any desired degree of pressure.

Four screws 55 controlling one cutter roll are pressurably adjusted in unison by means of the worm and worm wheel 60 and 61 62 and slprockets .63. When the two refining rol forming the right and lett hand parts of my refining engine are operated in series, the pulp from the beating engine is fed into the right hand receiving chamber 11 through the valve 70, whence itpasses between the blades 18 of the right hand cutter wheel 14 and the stationary bladesf16, the cutter wheel 14 at this time being rotated in a clockwise direction as viewed in Figure 3. A certain portion of the pulp emulsion will be carried around the top of the cutter roll and will again pass between the blades, the proportions being regulated by the adjustable Weir 36. the central chamber port 35 in the partition 33, and then passes between the blades of the cutter wheel and hed at the left of the engine, being delivered into the left hand chamber 10 from which it flows through the discharge passage 71,

the adjustable weir 72 being used in this instance to regulate the vproportions of the pulp emulsion which pass,-around the second cutter wheel.

Where the cutter wheels are operated in' parallel, the pulp is fed into both ofthe chambers 11 of the refining engine, and is delivered into the central chamber 30 from which it is drawn through one or both of the discharge ports31, 3 2, the port 35 being left open where the rolls are adjusted forsimilar refinement and being closed where the rolls are adjusted for dill'erent refinement. The adjustable Weir 72 when the left hand half of my refining engine is operated in parallel with the right hand half.

In order to secure the desired degree of refinement of the pulp, the valves 41 and 47 are opened and closed until fluid pressures have been obtained above and below the pistons 25 which gives a desired pressure between the movable and stationary blades. When the quantity of pulp increases through increased delivery from the beating engine, the lluid in the upper sections of the cylinders .will be forced into the expansion chamber 48, while the Huid from the expansion chamber 44 will flow into the Acylinders below the pistons 25, thus permitting the roll to assume a position somewhatfurther removed from the stationary blades but having a pressure toward the stationary blades which is somewhat greater Gthan'that which it'had when the roll was closer to the blades. 1

In the operation of the structure shown Figures 4 and`5, the initial pressure between the movable and stationary blades is obtained by rotation of the screws to bring about' any desired preliminary pressure.

4This construction is less flexible than that shown in. Figures 1 to 3 because of the greater dilliculty in regulating the relative pressures of the lowerand upper springs.

is opened v said invention, what v refining 'paper pulp comrising one or more rolls carrying cutter lades, stationary cutter blades beneath said rolls and occupyin half of a cylinder, uid means for yieldingly supporting said axles whereby the rolls will assume different positions with respect to the stationary blades depending upon the quantity of pul passing between the blades on the roll and) below said yielding supporting means'for the rolls.

2. A pulp refining engine for use in the manufacture of paper, comprising a cylindrical cutter roll having blades mounted thereon, a bed having arcuately arranged blades mounted therem, journals for said roll, iiuid means for yieldingly oating said journals to support said roll, and means for controlling the pressure of said fluid means on said journals.

3. In a refining engine for the preparation of pulp for the manufacture of paper, the combination with a cutter roll,of stationary blades beneath the cutter roll, a journal for the cutter roll, a cylinder, a piston within the cylinder supporting said journal, a source of fluid under pressure, means for conducting the llud under pressure into said cylinder above and below said piston, and means for regulating the degrees of pressure of the luidin said cylinder above and below iston. 4. n a refining engine for paper pulp, the combination with a cutter roll, of a journal therefor, a piston supporting said journal, a cylinder within which said piston operates, a source of ,Huid under pressure, a pressure Igauge connected with the cylinder,

a valve for regulating the quantity of fluid in said cylinder and the pressure of said fluid as indicated on -said gauge, and an expansion chamberv in communication, with being possible without them,

a section less than onethe stationary blades, and. means for adjusting the pressures above and -thereon, 'a bed said cylinder having a gaseous fluid therein to permit small quantities of luidjto pass to and from said cylinder during slight' motion of the piston in said cylinder whereby the said cutter roll may move away from the stationary blades when the quantity of ma-i terial passing between the cutter roll and the stationary blades exceeds a predetermined minimum.

5.' In a refining engine for pa er pulp, the .combination with lrotating an stationary blades responsive to variations in the quantity. of paper pulp passing between and a ed to discharge into said rening engine, the natural fluctuations in the discharge fromv .the beating engine being compensated for beatlng engine directly connectby thev movement of the cutter roll in the refming engine.

6. In a refining engine for paper pulp, the combination with a bin, of a pair' of cutter rolls in said bin, a chamber at each end 'of the bin, a divided chamber at the middle of the bin between the rolls, and means to close and open a port' in the partition dividing said middle chamber whereby pulp may be fed either from the two end chambers to the middle chamber by operating the rolls in parallel or may be fedseria'llyfrom one end chamber through the middle chamber to the other end chamber' by ope-rating the rolls in series.

7. pulp refining enginev for use in the manufacture, of aper, comprising .a cylindrical cutter ro l having blades mounted having blades therein mounted for co-operation with the blades of said roll, journals for said roll, a hydraulic jack `for supporting said `ournals, and a gas containing expansion c amber communicating with the liquid of said hydraulic jack whereby said journals are yieldably supported.

8. yA refining engine for paper pulpcomprising a roll havingblades thereon, a bed having blades therein for co-operating with said roll, a beam at each end of said roll extending transversely to the axis thereof, a

j ournal for said roll supported by each of said beams, pistons connected with each end of said beams, mounting each -osaid pistons, and means for supplying fluid under'pressure to said -cylinders to adjustably support said roll relatively to said bed.

In witness -whereoLiI hereunto subscribe my name this 8 day of'August, 1923.

f JAMES T. MURPHY.

a cylinder for recprocably 

